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Wood discoloration classification

Chemical discoloration: Abnormal discoloration of downed wood caused by chemical and biochemical reaction processes such as reddish-brown, brown or orange-yellow is chemical discoloration. Its color is generally more uniform, and the distribution is limited to the surface layer (depth of 1-5 mm), after drying, that is, fade and fade.
Discoloration by discoloration bacteria: It is formed under the action of discoloration bacteria. Blue and mildew are the most common. Followed by other sapwood color spots, there are orange yellow, pink or light purple, tan and so on. This defect is mainly caused by slow drying or lack of storage measures.
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